IRIS System Requirements

Before installing the latest version of the IRIS Accountancy Suite Software, please ensure that the systems you are using meet or exceed the minimum platform, hardware and software requirements, including service packs, detailed below.


If you have software installed that is not listed below, we strongly recommend that you review the lists of supported software and upgrade as soon as possible. IRIS can not guarantee that the latest version of our software will install successfully or perform effectively, if you are not using versions of the software listed below.

IRIS does not recommend the use of a wireless connection. Any troubleshooting needed will require a wired Ethernet connection.

Using IRIS over a VPN connection without a Terminal Server is unsupported and IRIS offers no guarantees it will work.

Running SQL Server and Exchange on the same server while possible, is not recommended, as it may impact the performance of IRIS Accountancy Suite Software.

Certain features of IRIS Accountancy Suite (notably Filing by Internet to HMRC and Companies House) and online technical support assistance require a broadband internet connection.

Click the links below to jump to a section:

Hardware Requirements
Supported Platforms
Software Requirements
Virtual Environments
Microsoft Windows 10 EOL

Hardware Requirements

The requirements below are a guide; a minimum specification for running IRIS on a dedicated server with 1-3 users.

Important: The number of applications running on the server and users you have on the system, will affect performance. For example, for 5-10 users, double the specification below; for 10-20+ users, quadruple the specification, and so on.

Note: We are happy to provide advice on this subject; however, we recommend that you speak to your IT service provider to ensure you have sufficient hardware to run your practice.

AreaStandalone or Networked ClientNetworked P2PNetworked Dedicated Server
Processor typeIntel Core i3/5/7/9 or AMD Ryzen equivalent
Processor speed2 GHz2 GHz2 GHz
Memory (RAM)4GB16GB16GB
Available hard disk space15GB or more20GB or more20GB or more
Minimum screen resolution1024 x 768
Suggested screen resolution1680 x 1050
NetworkN/ABandwidth: 100MbsLatency: <5 msBandwidth: 100MbsLatency: <5 ms

Support Platforms

Standalone, Client or P2P ServerMicrosoft Extended Support EndsIRIS Support Ends (Release)
32-bit or 64-bit versions of:
Windows 8.1: Standard, Professional or Enterprise editions10//01/2023
Professional only
Windows 10: Home, Professional, Pro Education, Pro for Workstations, Enterprise and Education editionsSee tableSummer 2020 v20.2.0
Windows 11: Home and Professional editions
Windows Server
32-bit or 64-bit versions of:
Windows Server 2012: Essentials, Foundation, Standard, Enterprise, or Datacenter editions
Windows Server 2012 R2: Essentials, Foundation, Standard, Enterprise, or Datacenter editions
64-bit versions of:
Windows Server 2016, 2019 and 2022: Essentials, Standard or Datacenter editions
Microsoft SQL Server
32-bit or 64-bit versions of:
Microsoft SQL Server 2012: Express, Standard or Enterprise Edition (Service Pack 4)
Microsoft SQL Server 2014: (Service Pack 3)
64-bit versions of:
Microsoft SQL Server 2016 (Service Pack 2)
Microsoft SQL Server 2017
Microsoft SQL Server 2019

Note: Microsoft SQL Server Express is only recommended for installations of up to six users. Express versions of SQL Server have a database size limit of 10GB.
Important: Customers who have over 10 users SHOULD use either Workgroup, (only available in SQL2012), Standard or Enterprise versions of SQL Server.

Software Requirements

Microsoft .NET Framework 4.8 as a minimum (mandatory from Autumn 2021 v21.3 release)

The Autumn release of the IRIS Accountancy Suite v21.3 will require our Workstation Setup to be run to ensure that new prerequisites are in place.
To speed up this process and for your convenience, we are advising that .NET 4.8 and MSVC 2019 are installed on the workstation in advance.

AreaRequirementsMicrosoft Extended Support EndsIRIS Support Ends (Release)
.NET FrameworkMicrosoft .NET Framework 4.8 as a minimum
TLS (Transport Security Layers)IRIS currently uses both TLS1.0 and TLS1.2, both must be enabled.
BrowserInternet Explorer 11 or later17/8/2021
Microsoft OfficeIRIS will work with packages where there are installed versions of the Microsoft Office 365 products.
Microsoft 365 Apps for Enterprise
Office 365 Enterprise E3
Office 365 Enterprise E5
Microsoft 365 Family
Microsoft 365 Personal
Microsoft Office Home & Student 2019
Microsoft 365 Apps for Business
Microsoft 365 Business Standard
Office 365 Nonprofit Business Premium
Microsoft 365 Business Standard
Office 365 Nonprofit E3
Office 365 Nonprofit E5
Office 365 Education E5
Microsoft Office 2010 (Service Pack 1)13/10/2020
click here
Spring 2021 v21.1.0
Microsoft Office 2013 
Microsoft Office 2016
Microsoft Office 2019
Microsoft Office 365
Anti-Virus and Firewall ProtectionSome Anti-Virus software or Firewall protection may prevent successful installations of IRIS software. In some cases, the anti-virus or firewall software may need disabling while the installation is running. If you require assistance with this, please contact your anti-virus or firewall software supplier.
To address Windows Firewall blocking access, see the following articles:
How to determine if you are using a Static/Dynamic Port
How to configure Windows Firewall for TCP ports IAS-6221,
How to configure Windows Firewall for UDP Port 1434 IAS-5219

Important: Installed versions of Office apps are compatible with IRIS Software; their browser based equivalents are not.

Virtual Environments

We test our products in virtual environments including PCs (HyperV) and Terminal Services along with virtualised hardware i.e. Server/Terminal Server(s)/configuration clusters.

To provide optimum performance in a virtualised cluster, our recommended setup is to have the application, SQL and Terminal Server(s) on separate virtual machines.

We do not specifically test against the following virtualised environments. Many customers have however, stated that they use these environments without a problem:

  • Citrix
  • VMWare
  • Remote Apps

If you do come across an issue, we will try and help you narrow down the area in the virtual environment that is causing the problem but cannot guarantee resolution in any untested platforms.

Remote Access including Terminal Server access
Remote access to PCs, Servers and Terminal Servers are tested via Microsoft’s Remote Desktop Connection on all supported platforms.

Microsoft Windows 10 EOL

Enter WINVER in the search box to identify the Edition and version of Windows 10 on your PC. In general, if Windows Updates are enabled you can expect the version of your Windows 10 to be updated automatically.

Windows 10 is identified by both Edition and Version details. End of Life (EOL) details differ between Editions. The table below defines where those Editions and Versions sit in terms of End of Service with regards to the Microsoft Modern Life Cycle Policy which our own Support policy follows.

Note: While IRIS products may continue to work using an EOL operating system, they will not be tested in these environments and we will not be able to offer support to customers using them.

Important: From the Autumn 2020 v20.3.0 release, you will not be able to install IRIS on any of the Editions/versions which have reached the EOL status dated May 2020 or before.

Windows 10, version historyDate of availabilityEnd of service for Home, Pro, Pro Education and Pro for Workstations editionsEnd of service for Enterprise and Education editions
Windows 10, version 1909November 12, 2019May 11, 2021May 10, 2020**
Windows 10, version 1903May 21, 2019December 8, 2020December 8, 2020
Windows 10, version 1809November 13, 2018November 10, 2020May 11, 2021**
Windows 10, version 1803April 30, 2018November 12, 2019May 11, 2021
Windows 10, version 1709October 17, 2017April 9, 2019October 13, 2020

* Windows 10, version 1703 for Enterprise, Education, and IOT Enterprise editions were released on April 11, 2017.
** Serviced for 30 months from release date per policy updated at September 6, 2018.